Welcome back noonie.
First of all, your machine is pretty light to be doing any fast and serious root work so you’ll find you will just have to work at them longer.
Another thing you can do is use a root pick instead of a bucket for the real tough roots. Some even come with a saw tooth section.
As for the mounting, I believe all you have to do is remove the rigid mount framework and reinstall the lift arms and links. The top link remains the same, If I recall.